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In order to complete a search begun thirty years ago for planetary nebulae and emission B stars in our galaxy, Mt. Wilson Observatory is shipping its small ten‐inch refractor telescope (actually a wide‐angle camera) to the University of Michigan's Lamont‐Hussey Observatory at Bloemfontein,...
National Bureau of Standards scientists have made use of the invariable frequency of molecular spectrum lines to control the accuracy of a clock. The frequency of an oscillator‐initiated microwave signal is fixed exactly at the frequency of the strongest (and most easily measurable) absorption...
Research Corporation scientific awards, consisting of plaques and honoraria of $2,500 each, have been received by Bruno Rossi, professor of physics at the Massachusetts Institute of Technology, and Henry Eyring, Dean of the University of Utah Graduate School. These awards are given annually by...
Particles whose radii are more than about one tenthousandth of an inch can be measured with a microscope or by the scattering of visible radiation.
Since the first formal meeting of the International Commission of Optics (an affiliate of the International Union of Pure and Applied Physics) held at Delft, Holland in July 1948, the U.S. National Committee of the I.C.O. has been reconstituted and enlarged. The present membership of this...
A periodical called the Australian Journal of Scientific Research is now being published quarterly by the Australian Council of Scientific and Industrial Research, Melbourne, in collaboration with the Australian National Research Council. It is being issued in two parts, one dealing with the...
Any surface moving through a gas experiences a retarding force, or drag, due to the viscous nature of the gas.
How important to American physicists are abstracts of the periodical literature in their field; how do they use abstracts; what do they think of the abstracts they now have; what kind of abstracts would they like to have? It is questions like these which the study now being conducted by the...
To increase the efficiency of optical components of military equipment, Corps of Engineers technicians have been investigating German developments in optical coatings with the help of German scientists who were familiar with such techniques.
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